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"Then you didn't take any remedial measures at that time?" I asked.　　然而接踵而来的状况，却不再是她们所能承担。赵御史文书已经来了。When a client accesses a server's web service, The client sends a message to the network card, The tcp/ip stack is part of the kernel, Therefore, the client information is transferred to the web service in user space through the kernel's TCP protocol, At this time, the destination destination of the client message is on the socket (IP: Port) that the web service is listening for. When a web service needs to respond to a client request, The destination destination of the response message sent by the web service is the client, At this time, The IP and port that the web service listens on becomes the origin instead, As we said, Netfilter is the real firewall, It is part of the kernel, Therefore, if we want the firewall to achieve the goal of "fire prevention", You need to set up checkpoints in the kernel. All incoming and outgoing messages have to pass through these checkpoints. After checking, those that meet the release conditions can be released, while those that meet the blocking conditions need to be blocked. As a result, input checkpoints and output checkpoints appear. These checkpoints are not called "checkpoints" but "chains" in iptables.另一方面，嘉靖深知胡宗宪是被迫降徽王府的，这封书信的字里行间，他竟也品出了这位老臣对明廷，对自己的思念，实是可叹。人到中年，營役半生，方迎風的人生卻迎來遽變！失婚失業，女兒離巢，她迷失、她頑抗，卻體力衰退、與社會脫節。身為別人的女兒、老婆、老媽，她卻忘了少女時代，也曾是個熱血勇悍、瘋狂追星的搖滾樂迷！二十年前的輕狂歲月，二十年後的柴米油鹽，面目全非的她，竟重遇當年迷戀的偶像！偶像潦倒不堪，丈夫欲斷難斷，種種挫折與衝擊，迫使她直面過去的失敗，重新振作，激勵自己與身邊人。唱著一首首動人歌曲，一群失意的中年男女，再次出發，為了自己，再活一次！